Unplugging EGR vs. EGR Delete

Discussion in 'Mazdaspeed 3/6 Engine' started by ejb2112, Apr 8, 2016.

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  1. ejb2112

    ejb2112 Greenie Member

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    Not sure if this is the right section. If not @Raider please move it.

    It was highly recommended to me I unplug my EGR to help with keeping the valves clean. My tuner (Justin) agreed and provided me a tune to account for that.

    So I started doing some research, and also read the thread here about how to delete the EGR. But I really don't understand the difference between deleting it vs. just unplugging it. Further confusing the situation, here in the Atlanta area, we have emissions testing. I assume if it's unplugged, I need to plug it back in for testing. If it's deleted, what does that mean for testing?
     
  2. Raider

    Raider Administraider Administrator Platinum Member

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    Only real concern is if the EGR is gummed up, it may not be fully closed. I have seen people post about that. Deleting straight up removes the EGR from the equation for a few bucks in materials. FWIW, I have a blockoff plate. The EGR delete kit is on my workbench though.
     
  3. 78jdbronco

    78jdbronco Greenie Member

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    As long as your egr closes, unplugging will prevent the exhaust gasses from recirculating.

    However, if you're into extra expenses, cleaner looks, reduced weight, removal of unused parts, and extra space...egr delete may be your bag, baby, yea...
     
    78jdbronco, via a mobile device, Apr 8, 2016
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  4. neganox

    neganox Feline Führer Moderator Platinum Member

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    Removing the EGR makes for easier swapping of turbos.
     
    neganox, via a Nexus device, Apr 9, 2016
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  5. Easter Bunny

    Easter Bunny Professional Engineer Greenie Member

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    Unplugging it is best if you would have too mane not ready codes for emissions. You can plug it back in flash a map and be good to go for emissions, then unplug it immediately after.

    Going bigger turbo usually makes it necessary to remove as the space is needed.
     
    Easter Bunny, via a HTC device, Apr 10, 2016
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  6. Raider

    Raider Administraider Administrator Platinum Member

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    True. The only catch is if it is caked in carbon and not fully closed.
     
    Raider, via an iPhone, Apr 10, 2016
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  7. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    I run unplugged because the EGR is closed until energized, so it's effectively a delete. Then, when inspection time comes around, I replug and re-flash an EGR-codes-enabled map.

    Bear in mind you get a few less MPG and a tad more KR-proneness without EGR.
     
  8. Castillo817

    Castillo817 Greenie Member

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    Not sure how your county emission testing is, but here where I live, we can have two non ready sensors. I have a full egr delete and I still pass my inspection.
     
  9. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    That cat is your saving grace. I have 1 not ready already being catless. The EGR would add two more, that's why I do the plug/un-plug thing.
     
  10. Castillo817

    Castillo817 Greenie Member

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    Lol definitely is. Well either way, you need a cat to pass iirc.
     
  11. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    *Technically* ;) Thankfully we're not in "Nazi-fornia"

    And though I like cats (animals), I hate cats (in my exhaust). I easily lost a good 15whp with just a single high-flow cat. Lots of logging showed me how much it sucked, haha.
     
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  12. ejb2112

    ejb2112 Greenie Member

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    I unplugged it on Saturday and all is well so far. Thanks, everyone.
     
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  13. SharksInSpace

    SharksInSpace Planets and shit. Silver Member

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    Unplugged mine last night after running some Techron through for the last couple of weeks to hopefully clear out any gumminess that would keep the valve from closing; going to eventually do the block off/delete but this sounds like a good, easy option for the time being.
     
    SharksInSpace, via a Samsung mobile device, Apr 13, 2016
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  14. onlyicansee

    onlyicansee Greenie N00B Member

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    Just unplugged mine. Hopefully all goes well

    Sent from my SAMSUNG-SM-G870A using Tapatalk
     
    onlyicansee, via a mobile device, Apr 14, 2016
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  15. PURPFOX

    PURPFOX Greenie Member

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    You'll notice a big difference in bat's if the egr is sealing shut
     
  16. onlyicansee

    onlyicansee Greenie N00B Member

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    I'm having a problem with some stutter under boost around 4k rpm. Also some popping. Just ordered step colder plugs and just unplugged the egr. I'm waiting on my DM delete kit.

    Sent from my SAMSUNG-SM-G870A using Tapatalk
     
    onlyicansee, via a mobile device, Apr 14, 2016
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  17. onlyicansee

    onlyicansee Greenie N00B Member

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    I also throw p0401 from time to time.


    Sent from my SAMSUNG-SM-G870A using Tapatalk
     
    onlyicansee, via a mobile device, Apr 14, 2016
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  18. Raider

    Raider Administraider Administrator Platinum Member

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    that is a clogged/stuck EGR.
     
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  19. onlyicansee

    onlyicansee Greenie N00B Member

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    After unplugging the egr I no longer have stutter at 4k rpm. I also didn't throw p0401 or p0403.

    Sent from my SAMSUNG-SM-G870A using Tapatalk
     
    onlyicansee, via a mobile device, Apr 14, 2016
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  20. Raider

    Raider Administraider Administrator Platinum Member

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    Oh you will, if not set up in ATR.
     
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